NCIS: Los Angeles' Hetty and Granger will run out of options when the Navy interferes in the team's attempts to rescue Callen and Sam during the season 6 premiere.

Kensi To Beat Up Deeks? Find Out What's Next For DensiOn 'NCIS: LA'

The season 5 finale left Callen (Chris O'Donnell) and Sam (LL Cool J) stranded on a bomb-laden submarine, one helmed by terrorists bound for San Diego. While the two agents will be willing to sacrifice their lives for the greater good, the choice will ultimately be out of their hands.

"Once they learn what these terrorists have planned, they realize that the only way they can stop them is to sacrifice their own lives," said executive producer Shane Brennan, according to TV Guide Magazine. The Navy, however, will have its own plans. "If a hostile submarine is sounding off the California shores, the U.S. Navy will sink it. It's that simple! Hetty and Granger realize that ultimately they're powerless, because the Navy is taking independent action."

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While the Navy prepares to obliterate the narco sub, Callen and Sam will continue to look for a way out (see photos above), Kensi (Daniela Ruah) and Deeks (Eric Christian Olsen) to search from the skies, and Hetty (Linda Hunt) and Granger (Miguel Ferrer) will hold down the for back at headquarters.

Whose plan will work the quickest? Find out when NCIS: LA returns to CBS on Sept. 29 at 10 p.m. ET. Click the video below to see a preview for the season 6 premiere.

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NCIS: LA, NCIS: Los Angeles, Television, CBS